An "OL" or open reading indicates a failed coil that requires immediate replacement

compression-based seal

5-10Vdc) to ensure seamless integration with modern Building Automation Systems (BAS)

this is an AC-specific coil

Belimo B252 Valve 318172-701 An "OL" or open readingThe Belimo B252 is a high performance 2 way characterized control valve designed for precision in hydronics. Featuring a 2 inch NPT connection and a 85 Cv rating, this valve ensures linear heat output through its unique equal percentage flow characteristic. Engineered with a nickel plated forged brass body and a stainless steel ball and stem, it provides superior durability in demanding HVAC chilled and hot water systems. The integrated characterizing